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FIG 3. Patient 12 (recurrence group).
A and B, Gadolinium-enhanced T1-weighted (400/14) (A) and FLAIR (10,002/175/2200) (B) representative axial MR images obtained at follow-up show a focus of enhancement close to the resection site (resection of an anaplastic astrocytoma) in the right frontal lobe, with surrounding T2 prolongation. Marked progression of enhancement and perifocal edema were noted on further follow-up images (not shown). Patient had progressive functional deterioration in clinical course, and chemotherapy was restarted.
C, ADC map from DW image (b = 0, 1000 s/mm2). This patient from the recurrence group exhibited a mean ADC in the enhancing lesion of 1.26 x 10-3 mm/s2, a mean ADC in T2 prolongation of 1.51 x 10-3 mm/s2, and a normalized ADC ratio of the enhancing region of 1.62. X indicates ROI of the enhancing lesion; Y, ROI in T2 prolongation.
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